Math. When I do follow my heart (or gut?) it's more about player reads than it is about "I know I'm going to fill my gutshot, even though I'm not getting the right price." So, I will sometimes follow feelings/reads about what THEY may have, but seldom if ever follow "heart" regarding draws.
And, no, I don't have a "lucky hand."
I will widen my range considerably at a passive table, in position. On the button in an unraised pot... I will often go with my heart and call with weak/speculative hands. But, is that really "heart"? Or is it pot odds
, position, having a good read and trusting your ability to out play your opponents after the flop?